Point of sale payment method

ABSTRACT

The invention concerns a method of making a payment transaction between a customer and a merchant using a payment card ( 200 ) of the customer including steps of: transmitting details of the payment transaction from a mobile device ( 202 ) to a remote server; capturing at least one image of the payment card using the mobile device of the merchant; transmitting the at least one image of the payment card to the remote server; identifying, by the remote server, the merchant and the payment card captured in the at least one image; and implementing the payment transaction between bank accounts ( 208, 210 ) of the customer and the merchant.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of pending U.S. application Ser. No. 14/140,153, filed Dec. 24, 2013, which is a continuation of U.S. application Ser. No. 12/368,387, filed Feb. 10, 2009 (now U.S. Pat. No. 8,645,274 issued Feb. 4, 2014). The entirety of the foregoing applications is herein incorporated by reference.

FIELD OF THE INVENTION

The present invention relates to a method and system for making payments, and in particular a method and system for making payments at a point of sale using a payment card.

BACKGROUND TO THE INVENTION

FIG. 1 illustrates schematically a payment method often used for making payments by payment card, such as a credit or debit card.

The payment card 102 is a smart card having a built-in chip 103, and is presented by a customer at a point of sale. The card is placed in a chip reader 104, which reads the chip and requests that the customer types his/her PIN (personal identification number). The correct PIN is stored on the electronic chip 103 and thus the chip reader 104 is able to immediately verify whether the PIN has been correctly entered. The card details and transaction details are then transmitted to a credit card clearing house (CCCH) 106, for example via a telephone line, and the credit card clearing house settles both the customer's account and the merchant's account, by transferring money from customer's bank 108 to the merchant's bank 110.

There are a number of drawbacks with the method represented by FIG. 1. Firstly, all businesses that wish to accept payments by smart card require a chip reader 104, which is costly, and not practical in many situations. Furthermore, the chip reader requires regular maintenance. There is thus a need for alternative means for verifying a customer's identity, and making electronic payments.

SUMMARY OF THE INVENTION

Embodiments of the present invention aim at at least partially addressing one or more of the needs in the prior art.

According to one aspect of the present invention, there is provided a method of making a payment transaction between a customer and a merchant using a payment card of the customer comprising: transmitting details of the payment transaction from a mobile device of the merchant to a remote server; capturing at least one image of the payment card using the mobile device; transmitting the at least one image of the payment card to the remote server; identifying, by the remote server, the merchant and the payment card captured in the at least one image; and implementing the payment transaction between bank accounts of the customer and the merchant.

According to an embodiment of the present invention, the method further comprises, prior to transmitting details of the payment transaction from the mobile device to the remote server, establishing a call between the mobile device and the remote server, the details being transmitted via the established call.

According to another embodiment of the present invention, the merchant is identified by the remote server by the caller identification number associated with the call.

According to yet another embodiment of the present invention, the call is a video call established via a mobile telephone network, and wherein said image of said payment card is captured by filming said payment card during said video call.

According to another embodiment of the present invention, the connection is a voice call, and wherein the server comprises an integrated voice response unit.

According to another embodiment of the present invention, the method comprises: after identifying the merchant and the payment card, receiving by the remote server a personal identification number from the customer; and comparing, by the remote server, the personal identification number with a pre-registered number associated with the payment card.

According to another embodiment of the present invention, the step of requesting a personal identification number from the customer comprises transmitting a PIN request from the remote server to the mobile device, and transmitting the PIN from the mobile device to the remote server.

According to another embodiment of the present invention, the step of requesting a personal identification number from the customer comprises transmitting a PIN request to a customer's mobile device.

According to another embodiment of the present invention, the payment card comprises a visual feature, and wherein the visual feature is captured in the at least one image.

According to another embodiment of the present invention, the method further comprises comparing, by the remote server, the visual feature in the captured image with a registered image in order to authenticate the payment card.

According to another embodiment of the present invention, the transaction details comprise at least a total amount of the payment transaction, and wherein the transaction details are typed using a keypad of the mobile device.

According to another embodiment of the present invention, the method further comprises, prior to the step of transmitting details of the payment transaction to the remote server, capturing by the mobile device at least one image to determine the payment details.

According to another embodiment of the present invention, identifying the payment card comprises using optical character recognition to recognize details printed on the card.

According to another aspect of the present invention, there is provided a system for making a payment comprising: a mobile device comprising a camera module arranged to capture at least one image of a payment card; and a remote server comprising a memory storing customer account details associated with an image relating to the payment card and merchant account details associated with details of the mobile device, the remote server arranged to identify the mobile device and to identify the payment card based on a comparison of at least part of the at least one captured image received from the mobile device and the image relating to the payment card, the remote server further being arranged to make the payment transaction between the customer's account and the merchant's account.

According to another embodiment of the present invention, the system further comprises a mobile device associated with the customer, wherein the remote server is further arranged to receive a personal identification number from the customer's mobile device and to compare the personal identification number with a number stored in the memory of the server associated with the payment card.

According to another aspect of the present invention, there is provided a remote server for making a payment transaction comprising: circuitry arranged to receive from a mobile device details of a payment transaction and at least one captured image of a payment card to be used in the payment transaction; a memory for storing a plurality of pre-registered images, and account details relating to a payment card associated with each image; and circuitry arranged to match a portion of the at least one captured image of the payment card in one of the pre-registered images, and to select the account details associated with the pre-registered image for use in making the payment transaction.

BRIEF DESCRIPTION OF TEE FIGURES

The foregoing and other purposes, features, aspects and advantages of the invention will become apparent from the following detailed description of embodiments, given by way of illustration and not limitation with reference to the accompanying drawings, in which:

FIG. 1 (described above) illustrates schematically a payment method currently used for making payments using a payment card;

FIG. 2 illustrates schematically a payment method according to an embodiment of the present invention;

FIG. 3 illustrates schematically a payment method according to an alternative embodiment of the present invention;

FIG. 4 illustrates schematically a payment system for implementing a payment method according to embodiments of the present invention; and

FIG. 5 illustrates the server of the system of FIG. 4 in more detail according to an embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT INVENTION

FIG. 2 illustrates schematically a method of payment using a payment card 200 and a mobile device 202.

The payment card 200 is any card allowing account details of a customer to be identified, and is for example a smart card comprising a chip 204, although in the method described herein, the payment card need not include electronic storage means.

Mobile device 202 for example belongs to the merchant, and comprises a camera (not shown in FIG. 2) that can capture images. In the present method, rather than using a chip reader to identify the customer and verify his/her PIN, mobile device 202 is used. Mobile device 202 is for example a mobile telephone, or other portable communications device comprising a camera and being capable of data, video and/or voice communication with a remote server.

Mobile device 202 is registered with a credit card clearing house (CCCH) 206. For example, the caller ID of the mobile device 202 is registered with the CCCH such that when a call or other data transmission is made using it, the calling/transmitting device is recognized, and thus the merchant is identified. Furthermore, the customer's payment card 200 is for example also registered with the CCCH 206, and preferably a PIN has been registered by the customer with the CCCH 206. The CCCH 206 executes the transaction between the customer's bank 208 and the merchant's bank 210, by directly requesting the transfers, for example after billing the customer.

The method starts at the point of sale, where a customer presents his or her payment card 200 to make a purchase. As shown by arrow 1 in FIG. 2, in a first step the merchant uses mobile device 202 to call the CCCH 206, which recognizes the merchant via the caller ID associated with the mobile device 202. The call is for example received by a server in the CCCH 206, which automatically responds to the call. In some embodiments the server in CCCH 206 operates an automatic voice response unit (AVRU). The call is for example a video call, or a standard voice call, made via a mobile telephone network (not shown).

Details of the transaction are then provided by the merchant. These could be typed into the keypad of the merchant's mobile device 202. In the case that an AVRU is used by the CCCH 206, the transaction details can be requested by a voice request in the AVRU, and a response typed by the merchant in the keypad of the mobile device 202, and recognised by the AVRU. Alternatively, the details could be spoken by the merchant and voice recognition used to determine the transaction details. The transaction details include at least the total transaction amount, and in some embodiments could include other details, such as the transaction date if the transaction is not to be executed immediately.

In alternative embodiments, rather than the merchant entering the transaction details, such as the total amount of the transaction, using the keypad or by voice, this data is captured automatically by the mobile device 202, for example using the camera of the mobile device. In particular, the device may comprise a barcode application adapted to decode barcodes. The merchant then uses the camera of the mobile device to capture images of barcodes attached to items that the customer wishes to purchase, and the barcodes are automatically decoded by the barcode application on the mobile device, to extract the price of the item, and optionally other details such as the name of the product. Once all of the barcodes have been captured and decoded, the total transaction amount is transmitted to the CCCH 206, for example by SMS text message. In this case; a call to the CCCH 206 is for example not needed. Additionally, not only barcodes of products could be scanned, but also the barcode of any offers, discounts or coupons, such that these can be taken into account.

Alternatively, in the case where a meter determines the transaction amount, for example a taxi meter in a taxi, or a parking payment machine displaying an amount to be paid, the merchant films or takes one or more images of the meter using the mobile device 202, and the transaction amount could then be automatically determined from the image, either by the mobile device 202, or by the CCCH 206, using image recognition.

The CCCH 206 then requests that the merchant provides an image of the payment card to be used in the transaction. For example, in some embodiments, a voice instruction is provided by the AVRU implemented by the server in CCCH 206 for the merchant to capture images of the payment card, or in the case of a video call, visual instruction could be transmitted to the display of the mobile device 202 by the server of CCCH 206. The merchant then captures one or more images of the payment card 200 using the camera of the mobile device 202. The captured images of the card are transmitted to the CCCH 206, for example either as part of the video call, or separately in the form of a media message. Other means of transmitting the image are possible.

The CCCH 206 recognizes the payment card 200 from the image, for example by recognizing the number stamped in the card, or by recognizing the branding of the card, or other features of the card. The payment card 200 for example also comprises a visual feature 212, distinguishing the payment card, which could be a type of barcode or the like. This can be used in some embodiments to recognise the card and also to check the authenticity of the payment card 200 The CCCH 206 then preferably prompts the customer to enter the pre-registered PIN, or a random part of it, for example using an AVRU, via the merchant's phone. The entered characters are transmitted to the CCCH 206 for verification. This PIN could be the same PIN that is stored on chip 204 of the payment card 200, but for security reasons, it could be a different number.

The CCCH 206 then verifies that the PIN has been correctly entered, and if so, settles both accounts, for example by billing the customer the transaction amount, and crediting the merchants bank with the corresponding amount. The CCCH 206 then for example sends an SMS (short message service) text message to the merchant's phone to confirm that transaction has been executed, meaning that the merchant can allow the customer to leave the store with the goods. If the customer's mobile telephone number has been registered with the CCCH, an SMS text message could also be sent to the customer's device to confirm the transaction, for example taking the place of a printed receipt.

FIG. 3 illustrates an alternative method of making a payment. Reference numerals 200 to 212 designate the corresponding features in FIG. 2, and will not be described again in detail.

The method of FIG. 3 involves an additional device, mobile device 312, which is a mobile device belonging to the customer. In this embodiment, the steps leading up to requesting the customer's PIN are the same as those described in relation to FIG. 2 and will not be described again in detail.

Once the merchant has indicated the transaction details, and the customer's payment card has been recognized, the CCCH 206 identifies the customer. In this embodiment, the details of customer's device have been pre-registered with the CCCH 206. The CCCH 206 determines that the customer's mobile telephone details are known, and that the customer has opted to have their PIN requested using their mobile device. In this case, rather than sending the PIN request to the merchant's mobile device 202, the CCCH 206 transmits a PIN request to the customer's mobile device 312, for example in the form of an SMS message, or by making a call using an AVRU implemented by a server in the CCCH 206. Alternatively, a SIM (subscriber identity module) toolkit application, a java application, phone resident application or the like, installed on the mobile device 202, could be triggered by a text message or other data bearing protocol from the CCCH 206 to present on the display of mobile device 202 a message requesting the customer's PIN. The customer receives the request, and responds by providing the PIN, for example by typing the characters on the keypad of mobile device 312, and transmitting these characters via SMS, or within the AVRU, the AVRU recognising the characters by their tone, or through the phone resident application on the mobile device 202.

Once the CCCH 206 has verified that the PIN is correct, a confirmation SMS can be transmitted to the customer's device 312, and to the merchant's device 202.

As described above, in both the methods of FIG. 2 and FIG. 3, the image of the customer's payment card 200 is captured using the camera of the merchant's mobile device, for example either during a video call, or as a separate image that can be transmitted, for example as a media message. In the case of a media message, in some embodiments, if the CCCH 206 determines that the captured image is not clear enough to be read, the CCCH could return a media message asking the merchant to try again. In the case that the image is captured during a video call, the return video provided to the merchant's mobile device by the CCCH 206 could indicate the identification status, such that when the card has been recognized a message appears on the merchant's phone 202 indicating this, and filming of the card is stopped.

FIG. 4 illustrates the blocks of a system 400 for implementing the method of FIG. 2 or FIG. 3. The mobile device 202 and CCCH 206 are illustrated in more detail, along with the interfaces through which they communicate.

The mobile device 202 comprises a camera module 402, a display 404 and a keypad 406. It may also comprise further components not shown in FIG. 4, for example a base band processor, memory and battery.

The CCCH 206 comprises a server 408 which is able to communicate with the mobile device 202. Server 408 is furthermore able to respond to voice and/or video calls and/or receive SMS text or media messages, and in some embodiments implements an AVRU for responding to call.

Server 408 comprises a memory 409 which stores a number of images associated with payment cards, and associated with each image, account details relating to the payment card are for example stored, along with a PIN associated with the payment card. In this way, when an image of the payment card captured by the merchant's mobile device is received by the server 408, the payment card can be identified by searching for a match among the registered images relating to payment cards, and in this way the customers account details can be determined. For example, the images stored in the memory 409 could include a distinctive region of the payment card, such as the visual feature 212, or an image of the card number stamped on the card, which can be recognised in the image captured by the mobile device using automatic object recognition implemented by the server 408. Furthermore, the memory may also store, associated with payment card details, an indication of whether a PIN request is to be made to a customer via their mobile device rather than the merchant's phone, and if so the customer's mobile telephone number is also stored.

As illustrated, in this example the interfaces between the mobile device 202 and the server 408 include the Internet 410, a mobile telephone network 412 and the public switched telephone network (PSTN) 414. In particular, the mobile device 202 may have WLAN (wireless local area network) access, allowing the merchant to access the Internet directly via a modem in the mobile device, and contact server 408 via an encrypted connection over the Internet 410. Alternatively, the mobile device 202 may be connected to the Internet 410 via the mobile telephone network 412, for example using 3G or WAP (wireless application protocol), and may connect to the server 408 via a secured encrypted connection via the mobile network 412 and the Internet 410. Alternatively, the server 408 may have a connection to the mobile network 412 directly, in which case the mobile telephone 202 could communicate to the server 408 directly via the mobile network 412, for example using 3G in the case of a 3G video call. As a further alternative, the server 408 may be accessed via the public switch telephone network (PSTN), illustrated by block 414, either via the mobile telephone network 412 or the Internet 410 accessible by the mobile device 202.

FIG. 5 illustrates the server 408 of FIG. 4 in more detail according to one embodiment.

As illustrated, a communication interface 502 is provided for communicating with the mobile device of the merchant. Communication interface 502 for example comprises circuitry for connecting the server 408 to one or more of the interfaces illustrated in FIG. 4 allowing communication with the mobile device.

The communication interface 502 is connected to a processor 504, which is in turn connected to an optional barcode decoder 506. The barcode decoder 506 is provided in embodiments in which the visual feature 212 is a 2-D barcode. The barcode decoder decodes the card details and any other data encoded by the barcode.

The memory 409 is connected to processor 504, and comprises a merchant database 508, and a customer database 520. In this example, the merchant database comprises merchant names 512, each associated with a merchant caller identifier 514, and merchant account details 516. The customer database comprises customer names 518, each associated with a customer card number 520, which is the payment card number of the customer's payment card, and customer account details 522.

The processor 504 executes the steps of the server described above in relation to FIGS. 2 and 3, for example providing an automotive voice response system, and accessing the memory 409 to extract account detail of the customer and merchant etc.

Thus, a method has been described wherein a mobile device is used by a merchant to make a customer payment transaction, using the camera of the mobile device to identify and in some embodiments authenticate the customer's payment card. The mobile device can then be used to make a secure connection to a credit card clearing house or the like in order to provide the transaction details, and preferably initiate a PIN request from the credit card clearing house.

An advantage of the payment method described herein is that, by using a mobile device having a digital camera and the facility to connect to a credit card clearing house via one of a number of possible connection means, the payment can be made in a cost effective and simple fashion. In particular, mobile devices are affordable devices that are already in high circulation, making them readily available for this purpose. In some embodiments, connection to the CCCH is via a video call, which has the additional advantage of allowing an image of the payment card to be captured with real time response from the CCCH. Mobile devices increasingly have 3G capability or the like, allowing video calls to be made.

In some embodiments, a PIN request is made to a customer's mobile device. This has the additional advantage of adding an extra level of security to the transaction. In particular, in the case that the payment card is stolen, the thief would also need the card owner's mobile device and PIN in order to make a fraudulent transaction.

Whilst a number of particular embodiments have been described, it would be clear to those skilled in the art that there are many alternatives that may be applied. For example, while the invention has been described in the case of a payment by credit card via a credit card clearing house, it will be apparent to those skilled in the art that the payment could relate to any type of card payment, in which a card can be identified to identify the customer's bank account. Furthermore, the credit card clearing house could be any establishment that can receive authenticate details of a transaction, and apply these by debiting the customer and crediting the merchant.

It will be clear that while the present invention has been described in relation to a purchase by a customer, the same method could also be applied to reimburse any customer, in which case the same acts could be performed, only the transaction details indicating that the money has to be credit to the customer's account, and debited from the merchant's bank.

Furthermore, while a few examples of connection interfaces between the merchant's mobile device and the CCCH have been provided, other interfaces could be used, for example other types of mobile telephony standards for calls or internet connections.

It will be apparent to those skilled in the art that the features described herein in relation to the various embodiments could be combined in alternative embodiments in any combination. 

The invention claimed is:
 1. A computer-implemented method comprising: receiving, at a computer system and over one or more mobile carrier networks, a first short message service (SMS) text message that includes encoded information for an order, wherein the encoded information corresponds to, at least, an image that represents one or more items that are included in the order; automatically decoding, by the computer system in response to receiving the first SMS text message, the encoded information included in the first SMS text message to identify the one or more items included in the order, wherein the decoding includes (i) identifying the image based on the encoded information, (ii) determining whether the image corresponds to any of a plurality of items available for order based on a comparison of information extracted from the image with information associated with the available items, and (iii) identifying the one or more items based on the determining; identifying, by the computer system, a vendor and a customer for the order based, at least in part, on the first SMS text message; retrieving, by the computer system and from one or more data sources that are accessible to the computer system, (i) customer information that corresponds to the customer for the order and (ii) vendor information that corresponds to the vendor for the order; inserting, by the computer system, into one or more internet-based messages at least a portion of the following information derived from the first SMS text message: (i) information associated with the one or more items, (ii) the customer information, and (iii) the vendor information; transmitting, by the computer system and over one or more other networks, the one or more internet-based messages to one or more other computer systems to cause the order to be fulfilled by the vendor; and transmitting, by the computer system and to a mobile computing device associated with the customer, a second SMS text message that provides confirmation of the order, the second SMS text message being transmitted over the one or more mobile carrier networks.
 2. The computer-implemented method of claim 1, further comprising: identifying, by the computer system, authorization information for the order; and determining, by the computer system, whether the order is authorized for the customer based, at least in part, on a comparison of the authorization information and the customer information for the customer, wherein the order is processed in response to determining that the order is authorized for the customer.
 3. The computer-implemented method of claim 2, wherein: the authorization information is identified from one or more SMS text messages that are provided for the order, and the one or more SMS text messages include the first SMS text message that includes the encoded information.
 4. The computer-implemented method of claim 3, wherein the one or more SMS text messages include a third SMS text message that (i) is provided in association with the first text SMS message and (ii) includes the authorization information.
 5. The computer-implemented method of claim 2, wherein: the customer information includes a PIN code for the customer, the comparison comprises comparing the authorization information with the PIN code, and the order is determined to be authorized when the authorization information matches the PIN code.
 6. The computer-implemented method of claim 2, further comprising: determining, by the computer system, whether authorization of the customer is required to process the order based, at least in part, on the customer information, wherein identifying the authorization information and determining whether the order is authorized are performed in response to determining that authorization is required.
 7. The computer-implemented method of claim 6, wherein the determination of whether authorization is required is based on user-defined authorization settings maintained by the computer system that indicate whether authorization is required for orders placed for the customer.
 8. The computer-implemented method of claim 2, wherein identifying the authorization information comprises: sending, by the computer system and to the mobile computing device, a third SMS text message that prompts the customer to enter the authorization information; and receiving, at the computer system and from the mobile computing device, a fourth SMS text message that includes the authorization information.
 9. The computer-implemented method of claim 1, wherein processing the order comprises: retrieving, by the computer system, stored payment information for the customer; and transmitting, by the computer system, the payment information for the customer to one or more payment processing systems that are associated with one or more of: (i) the customer for the order and (ii) the vendor for the order.
 10. The computer-implemented method of claim 1, wherein the encoded information includes one or more codes that correspond to the one or more items in the order.
 11. The computer-implemented method of claim 1, wherein identifying the vendor and the customer comprises: selecting a first unique identifier and the second unique identifier in the first SMS text message; identifying, by the computer system, a customer account that corresponds to the first unique identifier, wherein the customer account identifies the customer and includes the customer information; and identifying, by the computer system, a vendor account that corresponds to the second unique identifier, wherein the vendor account identifies the vendor and includes the vendor information.
 12. The computer-implemented method of claim 11, wherein: one of the first unique identifier and the second unique identifier is a telephone number from which the first SMS text message was sent, and the other one of the first unique identifier and the second unique identifier is included as part of a payload of the first SMS text message.
 13. A computer system comprising: a communication interface that is programmed to (i) receive first SMS text messages over one or more mobile carrier networks that include encoded information for orders, (ii) transmit second SMS text messages over the one or more mobile carrier networks that provide order confirmations, and (iii) transmit internet-based messages over one or more other networks to other computer systems to cause the orders to be fulfilled, wherein the encoded information corresponds to, at least, an image that represents one or more items that are included in each of the orders; a decoder that is programmed to automatically decode, in response to receiving the first SMS text messages, the encoded information included in the first SMS text messages to identify the one or more items included in each of the orders, wherein the decoding includes (i) identifying the image based on the encoded information, (ii) determining whether the image corresponds to any of a plurality of items available for order based on a comparison of information extracted from the image with information associated with the available items, and (iii) identifying the one or more items based on the determining; one or more storage devices that are programmed to store customer information and vendor information; and one or more processors that are programmed to (i) identify vendors and customers for the orders based, at least in part, on the first SMS text messages, and (ii) insert into the internet-based messages at least a portion of the following information derived from the first SMS text messages: (a) information associated with the one or more items, (b) the customer information, and (c) the vendor information, wherein the second text messages are transmitted by the communication interface mobile computing devices that are associated with the customers.
 14. The computer system of claim 13, wherein the one or more processors are further programmed to identify authorization information for the orders and determine whether the orders are authorized for the customers based, at least in part, on comparisons of the authorization information and the customer information for the customers, wherein the orders are processed in response to determining that the orders are authorized for the customers.
 15. The computer system of claim 14, wherein: the authorization information is identified from one or more SMS text messages that are provided for the orders, and the one or more SMS text messages include the first SMS text messages that includes the encoded information.
 16. The computer system of claim 15, wherein the one or more SMS text messages include third SMS text messages that (i) are provided in association with the first SMS text messages and (ii) include the authorization information.
 17. The computer system of claim 14, wherein: the customer information includes PIN codes for the customers, the comparisons comprise comparing the authorization information with the PIN codes, and the orders are determined to be authorized when the authorization information match the PIN codes.
 18. The computer system of claim 14, wherein: the one or more processors are further programmed to send, to the mobile computing devices, third SMS text messages to prompt the customers to enter the authorization information, and the communication interface is further programmed to receive, from the mobile computing devices, fourth SMS text messages that includes the authorization information.
 19. The computer system of claim 14, wherein the processor is programmed to identify the vendor and the customer by performing operations comprising: selecting first unique identifiers and second unique identifiers in the first SMS text messages; identifying customer accounts that correspond to the first unique identifiers, wherein the customer accounts identify the customers and include the customer information; and identifying vendor accounts that correspond to the second unique identifiers, wherein the vendor accounts identify the vendors and includes the vendor information.
 20. The computer system of claim 19, wherein: one of the first unique identifiers and the second unique identifiers are telephone numbers from which the first SMS text messages was sent, and the others one of the first unique identifiers and the second unique identifiers are included as part of a payload of the first SMS text messages. 